Update on choosing the Intercom workspace (#4019)

* Update on choosing the Intercom workspace

There is no information on how to choose the Intercom workspace to access. Hence, updating the information in step 5 of ## Getting started.

Statement added as below:
Select the Intercom workspace to access from a dropdown list beside the statement "Segment wants to access".

* Update index.md

As advised by Spencer in Jira ticket https://segment.atlassian.net/browse/KCS-32, replace:
"Select the Intercom workspace to access from a dropdown list beside the statement "Segment wants to access
with 
"If you have multiple Intercom workspaces, please choose the one that you'd like to connect to Segment"

* Update src/connections/destinations/catalog/actions-intercom-cloud/index.md

Co-authored-by: markzegarelli <mark.zegarelli@segment.com>

Author: tanjinhong72

src/connections/destinations/catalog/actions-intercom-cloud/index.md

@@ -31,7 +31,7 @@ Intercom Cloud Mode (Actions) provides the following benefits over the classic I
 2. Search for **Intercom Cloud Mode (Actions)** in the Destinations Catalog, and select the destination.
 3. Click **Configure Intercom Cloud Mode (Actions)**.
 4. Select the source that will send data to Intercom Cloud Mode (Actions) and follow the steps to name your destination.
-5. On the **Settings** tab, authenticate with Intercom using OAuth.
+5. On the **Settings** tab, authenticate with Intercom using OAuth. If you have multiple Intercom workspaces, choose one workspace that you'll connect to Segment.
 6. Follow the steps in the Destinations Actions documentation on [Customizing mappings](/docs/connections/destinations/actions/#customize-mappings).
 7. Enable the destination and configured mappings.